Compaq Presario 5BW Series, Maintenance And Service Manual

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501-xx Video controller test failed The following step applies to error
codes 501-xx through 516-xx:
Replace the system
board and retest.
502-xx Video memory test failed
503-xx Video attribute test failed
504-xx Video character set test failed
505-xx Video 80 × 25 mode 9 × 14
character cell test failed
506-xx Video 80 × 25 mode 9 × 14
character cell test failed
507-xx Video 40 × 25 mode test failed
508-xx Video 320 × 200 mode color set 0
test failed
509-xx Video 320 × 200 mode color set 1
test failed
510-xx Video 640 × 200 mode test failed
511-xx Video screen memory page test
failed
512-xx Video gray scale test failed
514-xx Video white screen test failed
516-xx Video noise pattern test failed
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